Thickener mineralization foam elimination structure

Abstract

This utility model discloses a thickener foam elimination structure, comprising: a thickener treatment tank, a rake frame arranged within the thickener treatment tank, and multiple sets of scraper components vertically supported on the rake frame. The multiple sets of scraper components are arranged sequentially and at intervals along the circumference of the treatment tank, moving in response to the fluctuations in the slurry surface within the thickener treatment tank, thereby scraping the mineralized foam in the thickener treatment tank towards the center and causing it to accumulate. A thickener bridge is also erected above the thickener treatment tank, and a spray system is mounted on the thickener bridge. The spray system is used to spray the supernatant from the upper layer of the thickener treatment tank or externally supplied washing water onto the mineralized foam, driving the mineralized foam towards the center of the thickener treatment tank and simultaneously defoaming the foam. This novel structure effectively reduces processing costs, prevents mineralized foam from overflowing outwards through overflow outlets located on the outer periphery of the thickener treatment tank, and significantly reduces the amount of defoamed mineral particles carried away by the overflow.

Description

Technical Field

[0001] This utility model relates to the field of mineralized foam elimination technology, and in particular, to a dense mechanical mineralized foam elimination structure. Background Technology

[0002] Flotation is the most widely used mineral processing method. Before flotation, mineral particles are crushed using crushers and mills until the valuable minerals are liberated. Then, taking advantage of the difference in hydrophobicity between the valuable minerals and gangue minerals, flotation reagents are added to form a stable froth layer, separating the valuable minerals from the gangue minerals. Because the valuable minerals are relatively hydrophobic and adhere to a large amount of flotation reagents, the mineralized froth is relatively stable, and a layer of mineralized froth easily exists above the thickener liquid surface. If defoaming is not carried out in time, it can easily lead to metal loss.

[0003] Currently, existing defoaming technologies for mineralization mainly include chemical defoaming and physical defoaming. Chemical defoaming involves spraying defoaming agents above the thickener. While this method has some effect, it increases costs, and the agents are recycled back to the return water tank and then back into the flotation process, affecting flotation performance.

[0004] Physical defoaming methods mainly include water flushing and mechanical defoaming. Mechanical defoaming is more complex and is rarely used in actual production. Currently, water flushing is the most common defoaming method in mines, but most mines experience poor defoaming effects. Furthermore, after defoaming, the particles tend to float on the liquid surface due to their slow settling speed and are easily lost with the overflow water. Utility Model Content

[0005] This utility model provides a dense mechanical mineralization foam elimination structure to solve the technical problems of existing mineralization foam elimination methods, such as complex mechanical defoaming, poor water defoaming effect, and particles floating on the liquid surface and being lost with overflow water due to slow settling speed.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A thickener foam elimination structure includes: a thickener treatment tank, a rake frame arranged in the thickener treatment tank, and multiple sets of scraper components vertically supported on the rake frame. The multiple sets of scraper components are arranged sequentially and at intervals along the circumference of the thickener treatment tank to follow the movement under the action of the slurry surface fluctuation in the thickener treatment tank, thereby scraping the mineralized foam in the thickener treatment tank towards the center and gathering it. A thickener bridge is also erected above the thickener treatment tank, and a spraying system is erected on the thickener bridge. The spraying system is used to take the supernatant from the upper layer of the thickener treatment tank or take the externally supplied cleaning water and spray it onto the mineralized foam to drive the mineralized foam to move towards the center of the thickener treatment tank, while spraying and defoaming the mineralized foam.

[0008] Furthermore, multiple sets of scraper components are evenly spaced along the outer periphery of the thickener treatment tank and close to the outer edge of the thickener treatment tank; each scraper component includes a vertically arranged mounting bracket with its bottom end fixed to the rake frame, and a scraper that is movably mounted on the mounting bracket. The scraper is used to move up and down in response to the up and down fluctuation of the liquid surface in the thickener treatment tank, so as to drive the mineralized foam to move and gather towards the center of the thickener treatment tank.

[0009] Furthermore, the mounting bracket includes a vertically arranged mounting rod with its bottom end fixed to the rake frame, and a limiting plate fixed to the upper end of the mounting rod; the limiting plate is located at a depth of 0.4m to 1mm below the liquid surface of the thickener treatment tank; the scraper slides through the outer circle of the mounting rod above the limiting plate.

[0010] Furthermore, the scraper includes a blocking portion extending circumferentially along the thickener treatment tank, and an extension portion connected at an angle to one end of the blocking portion; the extension portion extends obliquely toward the center side of the thickener treatment tank and has an angle of 100° to 160° with the blocking portion.

[0011] Furthermore, the spraying system includes a spraying pipe network connected to the thickener bridge, several spray nozzles connected to the spraying pipe network, and a spraying control device connected to the spraying pipe network or the thickener bridge; the spraying control device is used to supply the supernatant or external cleaning water from the upper layer of the thickener treatment tank into the spraying pipe network, and then spray it outward from the several spray nozzles.

[0012] Furthermore, the spray network includes a ring-shaped pipe connected to the thickener bridge and multiple straight spray branch pipes; the multiple spray branch pipes are arranged sequentially at intervals along the circumference of the ring-shaped pipe, and the first end of each spray branch pipe is connected to the ring-shaped pipe, and the second end of each spray branch pipe extends radially toward the outer periphery of the thickener treatment tank; a number of spray nozzles are distributed on the multiple spray branch pipes.

[0013] Furthermore, each spray branch pipe has a row of multiple spray nozzles on its opposite sides, and the multiple spray nozzles in the row are arranged at intervals along the length of the spray branch pipe; the first spray nozzle in the row of multiple spray nozzles closest to the loop pipe is set perpendicular to the spray branch pipe, and the other multiple spray nozzles are set towards the center of the thickener treatment tank and have an angle of 0° to 90° with the spray branch pipe.

[0014] Furthermore, the spray control device includes a drive pump, the inlet side of which extends downward into the supernatant in the upper layer of the thickener treatment tank through an inlet pipe, and the outlet side of the drive pump is connected to a loop pipe; or, the spray control device includes multiple drive pumps, the inlet sides of which respectively extend downward into the supernatant in the upper layer of the thickener treatment tank through inlet pipes, and the outlet sides of which are respectively connected to a loop pipe and / or multiple spray branch pipes.

[0015] Furthermore, the sprinkler control device also includes an inlet pipe connected to an external water source, the outlet end of the inlet pipe being connected to a loop pipe, and a control switch for controlling its on / off state is provided in the inlet pipe; or, the sprinkler control device also includes a main inlet pipe connected to an external water source, and multiple inlet branch pipes connected to the main inlet pipe, the outlet end of each inlet branch pipe being connected to a loop pipe and / or multiple sprinkler branch pipes respectively, and a control switch for controlling its on / off state is also provided in the main inlet pipe.

[0016] Furthermore, the spray control device also includes a turbidimeter for detecting the turbidity of the supernatant in the upper layer of the thickener treatment tank, and a controller electrically connected to the turbidimeter; the turbidimeter is inserted downward into the supernatant in the upper layer of the thickener treatment tank and feeds back the detected turbidity value of the supernatant to the controller; the drive pump and the control switch are electrically connected to the controller respectively, so that the drive pump starts and the control switch is closed when the turbidity value of the supernatant is lower than the set value, and the drive pump is closed and the control switch is opened when the turbidity value of the supernatant is not lower than the set value.

[0017] This utility model has the following beneficial effects:

[0018] In this invention's thickener mineralization foam elimination structure, multiple scraper components are installed on the thickener's built-in rake frame. These scraper components move in response to fluctuations in the slurry surface within the thickener's treatment tank, thus scraping the mineralization foam towards the center of the tank. This eliminates the need for additional power components, effectively reducing processing costs. It also prevents the mineralization foam from overflowing outwards through the overflow outlets on the outer periphery of the thickener's treatment tank. Furthermore, the central concentration of the foam facilitates subsequent spray defoaming. The spray system can also utilize the supernatant from the upper layer of the thickener's treatment tank or externally supplied cleaning water to spray onto the mineralization foam, driving it towards the center of the thickener's treatment tank and simultaneously defoaming the slurry. The spraying of mineralized foam for defoaming has two advantages. First, it causes the mineralized foam to converge towards the center of the thickener tank during defoaming, allowing the defoamed mineral particles a longer settling time. This significantly reduces the chance of mineral particles being carried away by overflow water if they are too close to the overflow outlets around the thickener tank. This not only improves the defoaming effect of the mineralized foam but also greatly reduces the amount of defoamed mineral particles carried away by the overflow. Second, the spraying system can use the supernatant from the upper layer of the thickener tank for spraying, eliminating the need to add additional cleaning water. This effectively reduces the amount of cleaning water used and lowers the treatment cost. When the quality of the supernatant is poor, the spraying system can also use externally supplied cleaning water, which can effectively enhance the defoaming effect.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a top view schematic diagram of the dense mechanical mineralization foam elimination structure according to a preferred embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A partially enlarged schematic diagram of the foam elimination structure in medium-density mechanical mineralization;

[0023] Figure 3 yes Figure 1 A schematic diagram of the left-hand structure of the medium-density mechanical mineralization foam elimination structure.

[0024] Legend:

[0025] 1. Thickening tank; 2. Rake frame;

[0026] 3. Scraper component; 31. Mounting support rod; 32. Limiting plate; 33. Scraper;

[0027] 4. Dense machine cable tray;

[0028] 5. Sprinkler network; 51. Loop pipe; 52. Sprinkler branch pipe;

[0029] 6. Spray nozzle;

[0030] 71. Drive pump; 72. Inlet pipe; 73. Control switch; 74. Turbidity meter. Detailed Implementation

[0031] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0032] Reference Figure 1-3 A preferred embodiment of this utility model provides a thickener mineralization foam elimination structure, comprising: a thickener treatment tank 1, a rake frame 2 arranged within the thickener treatment tank 1, and multiple sets of scraper components 3 vertically supported on the rake frame 2. The multiple sets of scraper components 3 are arranged sequentially and at intervals along the circumference of the thickener treatment tank 1 to follow the movement under the action of the slurry surface fluctuation within the thickener treatment tank 1, thereby scraping the mineralization foam within the thickener treatment tank 1 towards the center and gathering it. A thickener bridge 4 is also erected above the thickener treatment tank 1, and a spraying system is mounted on the thickener bridge 4. The spraying system is used to take the supernatant from the upper layer of the thickener treatment tank 1 or take the externally supplied cleaning water and spray it onto the mineralization foam to drive the mineralization foam towards the center of the thickener treatment tank 1, while simultaneously spraying and defoaming the mineralization foam.

[0033] In the thickener mineralization foam elimination structure of this utility model, multiple sets of scraper components 3 are installed on the rake frame 2 built into the thickener itself. The scraper components 3 can follow the fluctuation of the slurry surface in the thickener treatment tank 1, thereby scraping the mineralization foam in the thickener treatment tank 1 towards the center and gathering it. No additional power components are needed, effectively reducing processing costs. At the same time, it also prevents the mineralization foam from overflowing outwards from the overflow port located on the outer periphery of the thickener treatment tank 1. Furthermore, the gathering of mineralization foam in the center is beneficial for subsequent spray defoaming. The spray system can also take the supernatant from the upper layer of the thickener treatment tank 1 or take externally supplied cleaning water and spray it onto the mineralization foam to drive the mineralization foam towards the center of the thickener treatment tank 1. Spraying defoaming of mineralized foam has two advantages. First, it causes the mineralized foam to gather towards the center of the thickener treatment tank 1 during the defoaming process, allowing the defoamed mineral particles a longer settling time. This greatly reduces the chance of the mineral particles being carried away by the overflow water because they are too close to the overflow outlets around the thickener treatment tank 1 and fail to settle in time. This not only improves the defoaming effect of the mineralized foam but also greatly reduces the amount of defoamed mineral particles carried away by the overflow. Second, the spraying system can use the supernatant from the upper layer of the thickener treatment tank 1 for spraying, eliminating the need to add additional cleaning water. This effectively reduces the amount of cleaning water used and lowers the treatment cost. When the water quality of the supernatant is poor, the spraying system can also use externally supplied cleaning water, which can effectively enhance the defoaming effect.

[0034] Optionally, such as Figure 1 As shown, multiple sets of scraper components 3 are evenly spaced along the outer periphery of the thickener treatment tank 1 and close to the outer edge of the thickener treatment tank 1 to effectively prevent mineralized foam from overflowing and being lost from the outer periphery of the thickener treatment tank 1. Figure 3 As shown, each scraper component 3 includes a vertically arranged mounting bracket with its bottom end fixed to the rake frame 2, and a scraper 33 that is movably mounted on the mounting bracket. The scraper 33 is used to move up and down in response to the up and down fluctuations of the liquid surface in the thickener treatment tank 1, thereby driving the mineralized foam to move and gather towards the center of the thickener treatment tank 1. In this optional solution, the scraper component 3 has a simple structure and does not require an additional driving device to drive its movement, which can effectively reduce the processing cost. At the same time, the up and down movement causes the mineralized foam to gather towards the center of the thickener treatment tank 1, which is beneficial for the subsequent spraying system to spray and defoam, thereby improving the defoaming effect of the mineralized foam.

[0035] In this optional solution, such as Figure 3As shown, the mounting bracket includes a vertically mounted mounting rod 31 with its bottom end fixed to the rake frame 2, and a limiting plate 32 fixed to the upper end of the mounting rod 31. The limiting plate 32 is located 0.4m to 1mm below the liquid surface of the thickener treatment tank 1. The limiting plate 32 is used to limit the downward movement of the scraper 33, preventing the scraper 33 from falling to a lower position due to its own weight or other external forces, thus affecting its working effect. The scraper 33 slides through the outer circle of the mounting rod 31 above the limiting plate 32.

[0036] In this optional solution, such as Figure 1 As shown, the scraper 33 includes a blocking portion extending circumferentially along the thickener treatment tank 1, and an extension portion connected at an angle to one end of the blocking portion. The blocking portion is used to prevent mineralized foam from overflowing along the outer periphery of the thickener treatment tank 1. The extension portion extends obliquely toward the center side of the thickener treatment tank 1 and has an angle of 100° to 160° with the blocking portion. The extension portion is used to apply a force to move the mineralized foam toward the center of the thickener treatment tank 1 during up-and-down movement, causing the mineralized foam to shift toward the center of the thickener treatment tank 1.

[0037] Optionally, such as Figure 2 and Figure 3 As shown, the spray system includes a spray pipe network 5 connected to the thickener bridge 4, a plurality of spray nozzles 6 connected to the spray pipe network 5, and a spray control device connected to the spray pipe network 5 or the thickener bridge 4. The spray control device is used to supply the supernatant from the upper layer of the thickener treatment tank 1 or external cleaning water into the spray pipe network 5, and then spray it outward from the plurality of spray nozzles 6.

[0038] In this optional solution, such as Figure 1 As shown, the spray network 5 includes a ring-shaped pipe 51 connected to the thickener bridge 4, and multiple straight spray branch pipes 52. The multiple spray branch pipes 52 are arranged sequentially at intervals along the circumference of the ring-shaped pipe 51, with the first end of each spray branch pipe 52 connected to the ring-shaped pipe 51, and the second end of each spray branch pipe 52 extending radially towards the outer periphery of the thickener treatment tank 1. Several spray nozzles 6 are distributed on the multiple spray branch pipes 52. In this optional embodiment, the arrangement of the ring-shaped pipe 51 and the spray branch pipes 52 enables the entire spray network 5 to be connected, and the distribution of several spray nozzles 6 on the multiple spray branch pipes 52 allows the spray network 5 to spray the mineralized foam more evenly in the circumference, thereby improving the defoaming effect of the mineralized foam.

[0039] In this optional solution, such as Figure 1As shown, each spray branch pipe 52 has a row of multiple spray nozzles 6 on opposite sides, arranged at intervals along the length of the spray branch pipe 52. The first spray nozzle 6 in the row, closest to the loop pipe 51, is positioned perpendicular to the spray branch pipe 52 to prevent mineralized foam from adhering to the loop pipe 51 and affecting its defoaming effect. The remaining spray nozzles 6 are positioned towards the center of the thickener treatment tank 1, with an angle of 0° to 90° between them and the spray branch pipe 52. During operation, since the spray branch pipe 52 extends radially from the center of the thickener treatment tank 1, and the spray nozzles 6 are positioned towards the center of the thickener treatment tank 1, the mineralized foam gathers towards the center of the thickener during the defoaming process. This allows for a longer settling time for the defoamed mineral particles, preventing them from being too close to the overflow outlets around the thickener treatment tank 1 and being carried away by the overflow water. This improves the defoaming effect and effectively reduces overflow loss.

[0040] Optionally, such as Figure 2 and Figure 3 As shown, the spray control device includes a drive pump 71. The inlet side of the drive pump 71 extends downward into the supernatant in the upper layer of the thickener treatment tank 1 through an inlet pipe 72. The outlet side of the drive pump 71 is connected to a loop pipe 51. During operation, the supernatant enters the loop pipe 51 and then reaches each connected spray branch pipe 52 through the loop pipe 51 to achieve uniform circumferential spraying. Alternatively, the spray control device includes multiple drive pumps 71. The inlet sides of the multiple drive pumps 71 extend downward into the supernatant in the upper layer of the thickener treatment tank 1 through inlet pipes 72. The outlet sides of the multiple drive pumps 71 are connected to the loop pipe 51 and / or multiple spray branch pipes 52 respectively. This arrangement can effectively increase the spray volume per unit time, thereby correspondingly improving the defoaming effect and defoaming efficiency. During operation, when the supernatant in the thickener treatment tank 1 is clear water, the spray system uses the upper clear water for spraying and defoaming, thus eliminating the need to add additional clean water and reducing treatment costs.

[0041] Furthermore, such as Figure 2 and Figure 3As shown, the spray control device also includes an inlet pipe 72 connected to an external water source. The outlet end of the inlet pipe 72 is connected to a loop pipe 51, and a control switch 73 for controlling its on / off state is provided in the inlet pipe 72. During operation, external cleaning water enters the loop pipe 51 and then reaches each connected spray branch pipe 52 through the loop pipe 51 to achieve uniform circumferential spraying. Alternatively, the spray control device also includes a main inlet pipe connected to an external water source and multiple inlet branch pipes connected to the main inlet pipe. The outlet end of each inlet branch pipe is connected to the loop pipe 51 and / or multiple spray branch pipes 52, and a control switch 73 for controlling its on / off state is also provided in the main inlet pipe. This arrangement can effectively increase the spray volume per unit time, thereby correspondingly improving the defoaming effect and defoaming efficiency. During operation, when the quality of the supernatant in the thickener treatment tank 1 is poor or even turbid, the spray system uses external cleaning water for spray defoaming, thereby further improving the defoaming effect.

[0042] Preferably, such as Figure 2 and Figure 3 As shown, the spray control device also includes a turbidimeter 74 for detecting the turbidity of the supernatant in the upper layer of the thickener treatment tank 1, and a controller electrically connected to the turbidimeter 74. The turbidimeter 74 is inserted downwards into the supernatant in the upper layer of the thickener treatment tank 1 and feeds back the detected turbidity value of the supernatant to the controller. The drive pump 71 and the control switch 73 are electrically connected to the controller, so that when the turbidity value of the supernatant is lower than the set value, the drive pump 71 starts and the control switch 73 closes, and when the turbidity value of the supernatant is not lower than the set value, the drive pump 71 closes and the control switch 73 opens. During operation, the spray system preferentially uses the clarified water from the upper layer of the thickener treatment tank 1. When the turbidity meter 74 detects that the water quality in the upper layer is good, the drive pump 71 is used to draw water from the upper layer of the thickener treatment tank 1 for spraying, without the need to add additional clean water, thus reducing treatment costs. When the turbidity meter 74 detects that the water quality in the upper layer of the thickener treatment tank 1 is poor or even turbid, the controller causes the spray system to shut off the drive pump 71 and open the valve of the control switch 73 to use external clean water for defoaming, thereby enhancing the defoaming effect.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A thickener mineralized froth elimination structure, characterized in that, include: Thickener treatment tank (1), rake frame (2) arranged in thickener treatment tank (1), and multiple sets of scraper components (3) vertically supported on rake frame (2). The multiple sets of scraper components (3) are arranged sequentially and at intervals along the circumference of thickener treatment tank (1) to follow the movement under the action of slurry surface fluctuation in thickener treatment tank (1), thereby scraping the mineralized foam in thickener treatment tank (1) towards the center to gather. A thickener bridge (4) is also installed above the thickener treatment tank (1). A spray system is installed on the thickener bridge (4). The spray system is used to take the supernatant from the upper layer of the thickener treatment tank (1) or take the externally supplied cleaning water and spray it onto the mineralized foam to drive the mineralized foam to move towards the middle of the thickener treatment tank (1) and spray the mineralized foam to defoam.

2. The dense mineralized foam elimination structure according to claim 1, characterized in that, Multiple sets of scraper components (3) are evenly spaced along the outer periphery of the thickener treatment tank (1) and close to the outer edge of the thickener treatment tank (1); Each scraper component (3) includes a vertically arranged mounting bracket with its bottom end fixed to the rake frame (2), and a scraper (33) that is movably mounted on the mounting bracket. The scraper (33) is used to move up and down in response to the up and down fluctuation of the liquid surface in the thickener treatment tank (1) to drive the mineralized foam to move and gather towards the center of the thickener treatment tank (1).

3. The dense mineralized foam elimination structure according to claim 2, characterized in that, The mounting bracket includes a vertically mounted mounting rod (31) with its bottom end fixed to the rake frame (2), and a limiting plate (32) fixed to the upper end of the mounting rod (31); The limiting plate (32) is located 0.4m to 1mm below the liquid surface of the thickener treatment tank (1); The scraper (33) slides through the outer circle of the mounting rod (31) above the limiting plate (32).

4. The dense mineralized foam elimination structure according to claim 2, characterized in that, The scraper (33) includes a blocking portion extending circumferentially along the thickener treatment tank (1) and an extension portion connected at an angle to one end of the blocking portion. The extension extends obliquely toward the center of the thickener treatment tank (1) and has an angle of 100° to 160° with the blocking part.

5. The dense mineralized foam elimination structure according to claim 1, characterized in that, The spray system includes a spray pipe network (5) connected to the thickener bridge (4), a number of spray nozzles (6) connected to the spray pipe network (5), and a spray control device connected to the spray pipe network (5) or the thickener bridge (4). The spray control device is used to supply the supernatant or external cleaning water from the upper layer of the thickener treatment tank (1) into the spray pipe network (5), and then spray it outward from several spray nozzles (6).

6. The dense mineralized foam elimination structure according to claim 5, characterized in that, The spray network (5) includes a ring pipe (51) connected to the thickener bridge (4) and in a ring shape, and multiple spray branch pipes (52) extending in a straight line; Multiple spray branch pipes (52) are arranged sequentially and at intervals along the circumference of the ring pipe (51), and the first end of each spray branch pipe (52) is connected to the ring pipe (51), and the second end of each spray branch pipe (52) extends radially toward the outer periphery of the thickener treatment tank (1). Several water nozzles (6) are installed on multiple spray branch pipes (52).

7. The dense mineralized foam elimination structure according to claim 6, characterized in that, Each spray branch pipe (52) has a row of multiple spray nozzles (6) on its opposite sides, and the row of multiple spray nozzles (6) are arranged at intervals along the length of the spray branch pipe (52). The first spray nozzle (6) in a row of multiple spray nozzles (6) that is closest to the ring pipe (51) is set vertically to the spray branch pipe (52), and the remaining multiple spray nozzles (6) are set toward the center side of the thickener treatment tank (1) and have an angle of 0° to 90° with the spray branch pipe (52).

8. The dense mineralized foam elimination structure according to claim 6, characterized in that, The spray control device includes a drive pump (71), the inlet side of which extends downward into the supernatant in the upper layer of the thickener treatment tank (1) through an inlet pipe (72), and the outlet side of the drive pump (71) is connected to a loop pipe (51); or The spray control device includes multiple drive pumps (71), the water inlet side of the multiple drive pumps (71) extends downward into the supernatant in the upper layer of the thickener treatment tank (1) through the water inlet pipe (72), and the drainage side of the multiple drive pumps (71) is connected to the loop pipe (51) and / or multiple spray branch pipes (52).

9. The dense mineralized foam elimination structure according to claim 8, characterized in that, The sprinkler control device also includes an inlet pipe (72) connected to an external water source, the outlet of the inlet pipe (72) being connected to a loop pipe (51), and a control switch (73) for controlling its on / off state is provided in the inlet pipe (72); or The sprinkler control device also includes a main water inlet pipe connected to an external water source, and multiple branch water inlet pipes connected to the main water inlet pipe. The outlet of each branch water inlet pipe is connected to a loop pipe (51) and / or multiple sprinkler branch pipes (52). The main water inlet pipe is also equipped with a control switch (73) for controlling its on / off state.

10. The dense mineralized foam elimination structure according to claim 9, characterized in that, The spray control device also includes a turbidimeter (74) for detecting the turbidity of the supernatant in the upper layer of the thickener treatment tank (1), and a controller electrically connected to the turbidimeter (74); The turbidity meter (74) is inserted downward into the supernatant in the upper layer of the thickener treatment tank (1) and the detected turbidity value of the supernatant is fed back to the controller. The drive pump (71) and the control switch (73) are electrically connected to the controller so that the drive pump (71) is started and the control switch (73) is closed when the turbidity value of the supernatant is lower than the set value, and the drive pump (71) is closed and the control switch (73) is opened when the turbidity value of the supernatant is not lower than the set value.

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